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The Journal of Cell Biology, Vol 135, 479-486, Copyright © 1996 by The Rockefeller University Press
ARTICLES |
B Allet, A Hochmann, I Martinou, A Berger, M Missotten, B Antonsson, R Sadoul, JC Martinou and L Bernasconi
Geneva Biomedical Research Institute, Glaxo Wellcome Research and Development S.A., Switzerland.
We have compared the behavior of wild-type mouse NEDD-2, a neural precursor cell-expressed, developmentally down-regulated cysteine protease gene, to various mutant forms of the gene in both apoptotic activity in neuronal cells and proteolytic cleavage in the Semliki Forest virus and rabbit reticulocyte protein expression systems. Our results confirm that NEDD-2 processing and apoptotic activity are linked phenomena. They identify aspartate residues as likely targets for autocatalytic cleavage. They establish that cleavage events only occur at specific sites. Finally, they pinpoint differential effects of individual mutations on the overall proteolytic cleavage patterns, raising interesting questions related to the mechanisms of subunit assembly.
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